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Deployment Guide

The VSM has virtual machine requirements much like other more traditional guest operating systems. At a high level,

the VSM requires a single virtual CPU, 2 GB of dedicated RAM, and three virtual network adapters (more information

about these virtual network adapters is provided later in this document).

The Cisco Nexus 1000V Series requires a VSM high-availability deployment model much like dual supervisors in a

physical chassis. These two VSMs are deployed in an active-standby configuration, with the first VSM functioning in

the primary role and the other VSM functioning in a secondary role. If the primary VSM fails, the secondary VSM will

take over.

Note that unlike cross-bar based modular switching platforms, the VSM is not in the data path. General data packets

are not forwarded to the VSM to be processed, but rather switched by the VEM directly. In two specific cases,

described later in this document, control traffic is processed by the VSM to be coordinated across all VEMs.

Cisco NX-OS Software

Cisco NX-OS Software is a data center–class operating system built with modularity, resiliency, and serviceability at

its foundation. Based on the industry-proven Cisco MDS 9000 SAN-OS Software, Cisco NX-OS helps ensure

continuous availability and sets the standard for mission-critical data center environments. The self-healing and highly

modular design of Cisco NX-OS makes zero-impact operations a reality and enables exceptional operational

flexibility. Focused on the requirements of the data center, Cisco NX-OS provides a robust and rich feature set that

fulfills the Ethernet and storage networking requirements of present and future data centers. With a CLI like that of

Cisco IOS

Software, Cisco NX-OS provides state-of-the-art implementations of relevant networking standards as

well as a variety of true data center–class Cisco innovations.

VSM Networking

The VSM is a virtual machine that requires three vNICs. Each vNIC has a specific function, and all are fundamental to

the operation of the Cisco Nexus 1000V Series. For definition of the VSM virtual machine properties, the vNICs

require the Intel e1000 network driver (Figure 2).

The e1000 network driver may not be the default driver when the virtual machine definition is built. Also note that the

e1000 driver may not be an available option based on the operating system selected when the virtual machine is

defined. You can manually change the driver in the virtual machine configuration file stored with the virtual machine.

Selecting "Other Linux 64-bit" as the operating system enables the selection of the e1000 driver and sets it as the

default driver.

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